Question

Why lithium ion cells are used in smartphones ​

Answer 1

Answer:

Compared with traditional battery technology, lithium-ion batteries charge faster, last longer and have a higher power density, for more battery life in a lighter package. When you know a little about how they work, they can work that much better for you.

Explanation:

And OEM'S prefer them because they make smartphones very light. The electrodes of a Li-Ion battery are made of lightweight lithium and carbon which makes the batteries very light. Lithium is a highly reactive element, which makes it possible to store a lot of energy in its atomic bonds.